add initial application structure with configuration, logging, and health check endpoints

internal/repository/hero_repo.go

@@ -5,6 +5,8 @@ import (
 	"database/sql"
 	"time"
 
+	"github.com/pkg/errors"
+
 	"epic-ent/internal/domain/dto"
 	"epic-ent/internal/domain/vo"
 	"epic-ent/internal/ent"
@@ -49,7 +51,7 @@ func (r *HeroRepository) Create(ctx context.Context, req dto.HeroCreateRequest)
 
 	hero, err := create.Save(ctx)
 	if err != nil {
-		return vo.Hero{}, err
+		return vo.Hero{}, errors.Wrap(err, "create hero")
 	}
 
 	return toVO(hero), nil
@@ -63,7 +65,10 @@ func (r *HeroRepository) GetByID(ctx context.Context, id int64) (vo.Hero, error)
 		).
 		Only(ctx)
 	if err != nil {
-		return vo.Hero{}, err
+		if ent.IsNotFound(err) {
+			return vo.Hero{}, sql.ErrNoRows
+		}
+		return vo.Hero{}, errors.Wrap(err, "get hero by id")
 	}
 
 	return toVO(hero), nil
@@ -151,7 +156,7 @@ func (r *HeroRepository) Update(ctx context.Context, id int64, req dto.HeroUpdat
 
 	affected, err := update.Save(ctx)
 	if err != nil {
-		return vo.Hero{}, err
+		return vo.Hero{}, errors.Wrap(err, "update hero")
 	}
 	if affected == 0 {
 		return vo.Hero{}, sql.ErrNoRows
@@ -170,7 +175,7 @@ func (r *HeroRepository) Delete(ctx context.Context, id int64) error {
 		SetUpdateTime(time.Now()).
 		Save(ctx)
 	if err != nil {
-		return err
+		return errors.Wrap(err, "delete hero")
 	}
 	if affected == 0 {
 		return sql.ErrNoRows